I need to strip (Date) from the file name that it shows in Calibre...I tried to use the find and replace and got it to remove the date in the () but not the () themselves...is there a trick to it to tell Calibre to delete and () and everything inside them?

Did you use regular expression search mode? If so, remember that parentheses have a special meaning. You'll need to escape them (use '\(' or '\)', respectively- obviously without the single quotes) to get literal parentheses.